Dust collecting apparatus



Patented Sept. 22, 1936 N ,UNITED STATES DUST COLLECTING APPARATUS 1 '7 :if

Isaac Fleming, Los Angeles, Calif. i Application April 3, 1935, Serial No. 144,490V s claims. (orsi-273) VMy invention relates to dust collecting apparatus and it has particular reference, lalthough not necessarily, to apparatus for vcollecting metal dust as produced by the grinding or polishing of 51 metalarticles with the motor driven wheel.

. :It is a purpose of my invention to provide a dust collecting apparatus which is characterized by a suction head that functions to produce in association with a grinding or polishing wheel, a plurality l; of air currents so correlated to the wheel as to collect all metal particles removed from the metal work by the wheel and particularly the finer metal particles known asV dusty which float in the air to be inhaled by and which are so injuriousl'- to the operator. l

It lis `also a purpose of my invention to provide ina dust collecting 4apparatus a suction head supporting means of simple construction by which a suction head 'is supportable in various positions of adjustment with relation to a grinding or polishing wheel to expose various portions of such wheel for the purpose'of permitting Work of vari'- ous shapes and sizes to be applied to the wheel in grinding, cutting or polishing thereof. Further, the-hood supporting means 'allows such adjustmentthereof as Vtc expose and' thus render'accessible the entire wheel and to thereby allow the ready removal thereof for substitution of anotherl wheel when yand as required. `3o 1I will'describe only one 'form of dust collecting apparatus embodying fmy'invention, and will then point out the novel featuresthereof-inclaims. /In the accompanying drawing: Y y y Y Fig. 1 is a view showing in top plan one form of dust'collecting apparatus embodying my invention.

Fig. 2y is a vview showing the same apparatus inside elevation, Fig. 3 is a view showing the same apparatus in 40 front elevation. 1 f Y Y Fig. 4 'is an enlarged vertical sectional view'of a hood embodied in the apparatus shown inthe preceding views. A

Referring `specifically to the drawing, my invention in its present embodiment comprises, a hood H, adapted to partlyhouse a wheel W, the latter fbeing removably secured to one end of a shaft S rotatable 'by a motor M supported in elevatedV position by a standard D. The wheel W so' may be Va grinding, polishing, orany other form of wheel by whichthe surface of metal vwork is adapted vto -betreated, as will be understood.

As shown in Figs. 1 and 3, the motor shaft S extends completely through and to opposite sides of the motor, such a showing being for the purpose of indicating that the motor M andthe wheel W are one of a number of such elements ywhich constitute inthe aggregate a bank or gang of suchelements, it being understood that in practice the metal working wheels, as well as the dust col- 5i? lecting hoods, are .used in multipleswith one hood for each' wheel. Of course, my invention is notv limitedzor restricted in any manner to the multiple use ofthe dust collecting hood. l

The foregoing explanation renders understand'- 10iA able :theillustration of a main suction pipe P which is ladapted to be connected to a suction fan (not shown) so that the latter produces therein; therequisite suction of air for the hood H. I Extending from and communicating .with the main ll hood H, and thetwo pipes are connected one to the .other in the manner best illustrated in Fig. 4 so that the pipe P2 telescopes within the pipe P1 to lpermit adjustment of the hood H toward and 25 away `from the wheel Wand yet maintain a connection between the hood and the kpipe P1 so that the suction produced in the main pipe P will function to cause airV to ilow inwardly through the hood. so

As illustrated in Fig. 4, the hood H, in its present embodiment, comprisesa hollow body of substantially circular form. The body is provided with an opening I5 spaced substantially diametrically from the pipe P2, and which opening 35 has aportion-extending peripherally of the body and other portions at the sides of the body. Extending inwardly from one side portion ofv the opening is a slot I6 designed for the purpose of receiving the shaft S and permitting horizontal 40 adjustment ofthehood. Fixed within ther hood H is an upper partition I1 spaced in parallelism with the-upperwall of `the hood to denne an intervenin'g upper passage I8 through which air is adapted to flow. 4

The Vupper or forward endA of the partition I1 terminates rearwardly or short of the upper end of the openingfIE to provide an inlet end at the upper end of the opening into which air is vadapted to` enter the passage I8. The lower or rear 60 end of the partition extends through'the pipe P?, to provide an air outlet'end for the passage i8 which merges into the bore of the pipe P2. Thus, it will be seen that the passage I8 communicates with the pipe P2 so that when air is caused to 55 ow inwardly through the pipe P2, the air is also caused to ow inwardly through the passage I8.

Within the hood H is fixed a lower partition I9 which spans the side walls of the hood and is spaced from the bottom wall thereof to provide an intervening lower passage 20. Similarly, the forward or outer end of the partition terminates rearwardly of the lower end of the opening I5 and at the periphery of the body, to form an inlet end for the passage 20. The inner end of the partition IS extends into the pipe P2 and terminates at a point corresponding to the inner end of the partition I1 to provide an outlet end for the passage 20 which is in direct communication with the interior of the pipe P2. Thus, it will be seen that when air is caused to flow inwardly through the pipe P2, air is also caused to flow inwardly through the passage 20.- Y Y The partitions I1 and I9 coact to form an intermediate passage 2I of an area to receive the wheel W and to allow for the necessary adjustment of the Vhood with respect to the wheel withouttheY periphery of the latter contacting with the partitions. The opening I5 constitutes the inlet end of the passage 2|, while the space between the inner ends Yof the partition Hand I9 constitute ,the outlet end of such passage, and as will be understood, air is caused to flow inwardly through this intermediate passage when a suction is produced within the pipe P2.

, For the purpose of preventing particles of metal removed from the metal work by the wheel from passing into the pipe P2 and ultimately entering the bearings of the suction fan, thepartition I9 is bent, as shown in Fig. 4, to provide a pocket or trap 22 in which the vertical portion thereof functions as an abutment or baffle to intercept the metal particles in their travel through the lower portion of the intermediate passage 2|.

The main suction pipe P is supported in horizontal position by a frame consisting of rear uprights 23 and forward uprights 24. .These uprights are connected at their upper ends by metal webs 25 shapedat their upper edges to receive the pipe P. One of these webs is shaped to accommodate thewidened portion of the pipe P2 where it is connected to the pipe P, as clearly shown in Fig. 2. For xedly securing the pipe P onthe webs, a yoke 26 is bolted or otherwise secured to the upper end of one rear upright 23 and to one of a vpair of horizontal rails 21 which extend forwardly from the webs 25 to be rigidly supported in horizontal position by diagonally disposed rails 28.

The railsY 21 are spaced apart to accommodate the pipes Pl and P2, as well as thehood H, and these elements are supported on the rails by means of a pair of arms 29 securedto andextending laterally from opposite sides of the hood H. These arms repose on the upper surfaces of the rails 21 so as to be slidable thereon and thus permithorizontal adjustment of the hood with respect tothe wheel, theV pipe P2 telescoping within the pipe Pl during such adjustment. To brace the pipe Pl against any tendencyto move upwardly, a yoke 3D is secured to the rails 21, as illustrated in Fig. 1. n h

In practise, the hood H in its association with the wheel W, houses the latter in such manner as to expose a portion of its periphery as well as parts of the sides thereof. The amount of such portions of the wheel W exposed in the opening is, of course, dependent upon the adjustment of the hood horizontally on the support, and it will be understood that the amount exposed is dependent upon what portions of the wheel itis desired to gain access to in order that the various parts of a particular piece of metal work can be applied to the periphery or sides of the Wheel in effecting polish, grinding, or buffing of the work. In the operation of the apparatus, let it be assumed that the wheel W is rotating in a counter-clockwise direction as when viewed in Fig. 4, so that that portion of the wheel exposed in the opening I5 is moving downward. With j ythe suction fan operating to produce a flow of air inwardly through the hood H, there will be pro- Y duced inthe intermediate passage 2I a current ofair which .passes inwardly of the opening I5 Similarly,in the passages AI8 and 20 other cur-t rents of air are produced, but because of the, facti that these passages are relatively narrow, the air is caused to travel therethrough at relatively high velocities, and these high velocities are utilized in the following manner:`

Therpassages having their inlet ends situated at the circumferential extremities ofthe opening I5, there is produced at these points suctions of relatively great intensity which function to collect and draw into the passages all metal dust rising and falling from the wheel not collected by the air traversing the intermediate passage 2|. Thus, irrespective of the wheels direction of rotation and the resultant resistance offered by such rotation to collectionof thev metal dust, the air currents induced in theV passages I8 and4 20 operate to effectively collect that metal dust which isso injurious to an operator.

Although I have herein shown and described a dust collecting apparatusin association witha machine used for the abrasionofmetal articles, it is to be understood that my apparatus canv be used in association with wood working machines or 4any other machinewhich generates injurious dust. Y v

I claim: Y

1. In combination; a dust collecting hood for wheels, having an opening thereinadapted to expose a portion of a wheel within the hood; a, suction pipe connected to said hood at aA point spaced from said opening; and means for so sup porting said hood and said pipe for movement as to expose greater or less portions of said wheel, said means comprising horizontal rails spaced to receive said hood and pipe therebetween, and arms fixed to said hood and slidable o n said rails;

2. A combination as' embodied in claimY 1 wherein a yoke is secured to saidk rails to overlie said ,pipe and thus-prevent upward movement thereof. between the rails. Y Y y n 3. A dust collecting hood for wheels, comprising; a hollow body having. a rear wall formed with an opening adapted for connection tov a suction pipe; and a partition inthe body spaced from the bottom wall thereof to define an air passage below the partition communicating with said opening, and having a partV disposed transversely of its length to form a dust trap the passage. K

within the body above 

